Exposed wheels is a risk but it depends whether or not your design requires it, Lynx's wheels are exposed but for that design to be in weight they do have to be. i *could* take enough weight out of the frame or weapon set up to have some very flimsy wheel protection but there wouldn't be much point. i could also make the rear spar wider to incorporate the wheels into the frame but again that would mean taking weight out of other places, at the end of the day with a robot like Lynx if people are going for your wheels they're forgetting about the gigantic bar trying to kill them.